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Wisconsin

$61+ Cheap flights from Ontario (ONT) to Wisconsin

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/21. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MKE
Jan 20 — Jan 271
Tue 1/20
Tue 1/27
1 adult, Economy
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Cheap flight deals from Ontario to Wisconsin

Cheapest flights from Ontario to Wisconsin
Explore the most affordable flight options available from Ontario to Wisconsin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 21, 2025.

This CheapOair deal was found by Cheapflights users on 12/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:45 amONT - ORD
1 stop15h 27mFrontier
Thu 1/17:57 pmORD - ONT
1 stop13h 22mFrontier
Deal found 12/21$234
This CheapOair deal was found by Cheapflights users on 12/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:45 amONT - MSP
1 stop15h 17mFrontier
Mon 1/59:46 pmMSP - ONT
1 stop26h 26mFrontier
Deal found 12/19$258
This CheapOair deal was found by Cheapflights users on 12/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:00 amONT - ORD
1 stop6h 17mFrontier
Thu 1/13:27 pmORD - ONT
1 stop27h 42mFrontier
Deal found 12/18$259
This CheapOair deal was found by Cheapflights users on 12/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:45 amONT - ORD
1 stop15h 27mFrontier
Sun 1/410:49 pmORD - ONT
1 stop20h 26mFrontier
Deal found 12/20$268
This Frontier deal was found by Cheapflights users on 12/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:00 amONT - ORD
1 stop6h 17mFrontier
Wed 12/319:34 pmORD - ONT
1 stop13h 19mFrontier
Deal found 12/18$282
This Frontier deal was found by Cheapflights users on 12/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:45 amONT - MSP
1 stop9h 54mFrontier
Wed 12/317:34 pmMSP - ONT
1 stop6h 25mFrontier
Deal found 12/19$284
This Frontier deal was found by Cheapflights users on 12/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:45 amONT - MSN
1 stop5h 30mFrontier
Mon 1/52:56 pmMSN - ONT
1 stop11h 03mFrontier
Deal found 12/20$284
This CheapOair deal was found by Cheapflights users on 12/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:45 amONT - ORD
1 stop15h 27mFrontier
Thu 1/13:27 pmORD - ONT
1 stop27h 42mFrontier
Deal found 12/18$285
This CheapOair deal was found by Cheapflights users on 12/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:45 amONT - ORD
1 stop15h 27mFrontier
Fri 1/27:00 amORD - ONT
1 stop18h 59mFrontier
Deal found 12/18$289
This Booking.com deal was found by Cheapflights users on 12/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:45 amONT - ORD
1 stop15h 27mFrontier
Sun 1/410:49 pmORD - ONT
1 stop24h 28mFrontier
Deal found 12/20$302
This CheapOair deal was found by Cheapflights users on 12/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:45 amONT - MSP
1 stop15h 17mFrontier
Thu 1/16:45 amMSP - ONT
1 stop19h 14mFrontier
Deal found 12/20$305
This CheapOair deal was found by Cheapflights users on 12/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:20 pmONT - ORD
1 stop23h 01mFrontier
Wed 12/319:34 pmORD - ONT
1 stop13h 19mFrontier
Deal found 12/19$309

Find flight deals from Ontario to Wisconsin

Keep the following information in mind while searching for Ontario to Wisconsin flight deals. Data was last updated December 21, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$129
(CheapOair)

One-way from

$61
(Trip.com)

Popular in

December

Cheapest in

August

Average price

$507
Provider with most accurate pricing for Los Angeles-Milwaukee-Mitchell flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Milwaukee-Mitchell flights.
Search Deals
From Ontario to Wisconsin
Search Deals
One-way flight from Ontario to Wisconsin
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($70 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Wisconsin that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 21, 2025.
Use the filters below to find and compare flights from Ontario to Wisconsin that are best for you.

Fly from

Ontario

Fly to

Wisconsin

Route

Depart

Return

Price

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

Tue 1/6

7:00 am-10:44 pm

1 stop13h 44m

Minneapolis St Paul

Wed 1/14

10:55 am-10:59 pm

1 stop14h 04m

$184

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

Sat 1/17

7:15 am-11:18 pm

1 stop14h 03m

Minneapolis St Paul

Sat 1/24

10:45 am-11:24 pm

1 stop14h 39m

$202

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

Sat 1/10

7:00 am-10:44 pm

1 stop13h 44m

Minneapolis St Paul

Sat 1/17

10:13 am-10:59 pm

1 stop14h 46m

$202

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

Thu 1/1

6:45 am-6:39 pm

1 stop9h 54m

Minneapolis St Paul

Mon 1/5

9:46 pm-10:12 pm

1 stop26h 26m

$208

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

Thu 1/15

8:02 am-8:37 pm

1 stop10h 35m

Minneapolis St Paul

Sun 1/18

10:00 am-7:01 pm

1 stop11h 01m

$217

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

Fri 1/23

6:20 am-11:57 pm

1 stop15h 37m

Minneapolis St Paul

Mon 1/26

5:22 pm-12:20 am

1 stop8h 58m

$218

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

Fri 1/23

6:20 am-11:57 pm

1 stop15h 37m

Minneapolis St Paul

Mon 2/2

5:22 pm-12:20 am

1 stop8h 58m

$229

OntarioChicago

ONT - ORD

ONTORD

Ontario

Sat 3/14

11:59 am-11:53 pm

1 stop9h 54m

Chicago O'Hare Intl

Mon 3/16

7:20 am-10:34 pm

1 stop17h 14m

$245

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

Wed 2/11

4:03 pm-11:55 pm

1 stop29h 52m

Minneapolis St Paul

Mon 3/2

6:29 am-11:32 pm

1 stop19h 03m

$246

OntarioMinneapolis

ONT - MSP

ONTMSP

Ontario

Thu 2/12

6:14 am-11:55 pm

1 stop15h 41m

Minneapolis St Paul

Sat 2/28

6:29 am-11:32 pm

1 stop19h 03m

$246

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/21

Showing 1-10 of 60 results
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Best time to book a flight from Ontario to Wisconsin

Have a flexible travel schedule? Discover the best time to fly to Wisconsin from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Wisconsin

What is the cheapest month to book a flight from Ontario to Wisconsin?

Currently, May is the cheapest month in which you can book a flight from Ontario to Wisconsin (average of $99). Flying from Ontario to Wisconsin in December is currently the most expensive (average of $267). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to WI?

Find hourly flight availability from Ontario to Wisconsin. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 21, 2025.

It’s optimal to fly from Ontario to Wisconsin at noon. By choosing this option you can save up to 22% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from Ontario to Wisconsin?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Wisconsin. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Ontario to Wisconsin flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Wisconsin

Get insights into the airlines that provide service to Wisconsin. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Wisconsin. Reviews last updated December 21, 2025.
Read reviews from past customers who have flown Southwest, Delta, and United Airlines from Ontario to Wisconsin. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,257 reviews

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Southwest
8.0
Very good
4,257 reviews
Southwest
8.0
Very good
4,257 reviews

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Delta
7.9
Good
8,021 reviews
Southwest
8.0
Very good
4,257 reviews

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
United Airlines
7.4
Good
9,100 reviews
Southwest
8.0
Very good
4,257 reviews

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
American Airlines
7.2
Good
11,050 reviews
Southwest
8.0
Very good
4,257 reviews

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Wisconsin. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Wisconsin?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly out of when you book flights from Ontario to Wisconsin.

  • How long is the flight from Ontario to Wisconsin?

    Frontier, Delta, and Alaska Airlines can get you from Ontario to Wisconsin in just under 9h 54m. Your travel time can differ by up to 3h 50m. Airlines will cover a distance of 1695 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Ontario to Wisconsin one-way?

    $67 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on American Airlines and United Airlines, with prices starting from $114 and $143, respectively.

  • What are the most popular routes from Ontario to Wisconsin?

    The most popular flight routes from Ontario to Wisconsin are Ontario - Chicago O'Hare Intl, Ontario - Minneapolis St Paul and Ontario - Madison Truax Field.

  • Can I find deals for flights from Ontario to Wisconsin that include hotel bookings?

    Yes. In addition to deals on Ontario to Wisconsin flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Wisconsin?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Wisconsin.

  • Can I find deals for business class flights from Ontario to Wisconsin?

    Yes. Cheapflights offers flight deals from Ontario to Wisconsin by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Wisconsin?

    Currently, May is the cheapest month in which you can book a flight from Ontario to Wisconsin (average of $99). Flying from Ontario to Wisconsin in December is currently the most expensive (average of $267). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Alternative routes for Ontario to Wisconsin

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Ontario to Wisconsin

Discover the top 4 airlines that operate flights from Ontario to Wisconsin. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$253Average$427FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$276Average$599FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$288Average$521FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$330Average$427FlexibilityNo cancel feeOn-time63%

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